[alsa-devel] [PATCH v5 2/7] ASoC: tegra: Allow 24bit and 32bit samples

[Jon Hunter]

On 25/11/2019 17:28, Dmitry Osipenko wrote:
> 25.11.2019 20:22, Dmitry Osipenko пишет:
>> 25.11.2019 13:37, Ben Dooks пишет:
>>> On 23/11/2019 21:09, Dmitry Osipenko wrote:
>>>> 18.10.2019 18:48, Ben Dooks пишет:
>>>>> From: Edward Cragg <edward.cragg at codethink.co.uk>
>>>>>
>>>>> The tegra3 audio can support 24 and 32 bit sample sizes so add the
>>>>> option to the tegra30_i2s_hw_params to configure the S24_LE or S32_LE
>>>>> formats when requested.
>>>>>
>>>>> Signed-off-by: Edward Cragg <edward.cragg at codethink.co.uk>
>>>>> [ben.dooks at codethink.co.uk: fixup merge of 24 and 32bit]
>>>>> [ben.dooks at codethink.co.uk: add pm calls around ytdm config]
>>>>> [ben.dooks at codethink.co.uk: drop debug printing to dev_dbg]
>>>>> Signed-off-by: Ben Dooks <ben.dooks at codethink.co.uk>
>>>>> ---
>>>>> squash 5aeca5a055fd ASoC: tegra: i2s: pm_runtime_get_sync() is needed
>>>>> in tdm code
>>>>>
>>>>> ASoC: tegra: i2s: pm_runtime_get_sync() is needed in tdm code
>>>>> ---
>>>>>   sound/soc/tegra/tegra30_i2s.c | 25 ++++++++++++++++++++-----
>>>>>   1 file changed, 20 insertions(+), 5 deletions(-)
>>>>>
>>>>> diff --git a/sound/soc/tegra/tegra30_i2s.c
>>>>> b/sound/soc/tegra/tegra30_i2s.c
>>>>> index 73f0dddeaef3..063f34c882af 100644
>>>>> --- a/sound/soc/tegra/tegra30_i2s.c
>>>>> +++ b/sound/soc/tegra/tegra30_i2s.c
>>>>> @@ -127,7 +127,7 @@ static int tegra30_i2s_hw_params(struct
>>>>> snd_pcm_substream *substream,
>>>>>       struct device *dev = dai->dev;
>>>>>       struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
>>>>>       unsigned int mask, val, reg;
>>>>> -    int ret, sample_size, srate, i2sclock, bitcnt;
>>>>> +    int ret, sample_size, srate, i2sclock, bitcnt, audio_bits;
>>>>>       struct tegra30_ahub_cif_conf cif_conf;
>>>>>         if (params_channels(params) != 2)
>>>>> @@ -137,8 +137,19 @@ static int tegra30_i2s_hw_params(struct
>>>>> snd_pcm_substream *substream,
>>>>>       switch (params_format(params)) {
>>>>>       case SNDRV_PCM_FORMAT_S16_LE:
>>>>>           val = TEGRA30_I2S_CTRL_BIT_SIZE_16;
>>>>> +        audio_bits = TEGRA30_AUDIOCIF_BITS_16;
>>>>>           sample_size = 16;
>>>>>           break;
>>>>> +    case SNDRV_PCM_FORMAT_S24_LE:
>>>>> +        val = TEGRA30_I2S_CTRL_BIT_SIZE_24;
>>>>> +        audio_bits = TEGRA30_AUDIOCIF_BITS_24;
>>>>> +        sample_size = 24;
>>>>> +        break;
>>>>> +    case SNDRV_PCM_FORMAT_S32_LE:
>>>>> +        val = TEGRA30_I2S_CTRL_BIT_SIZE_32;
>>>>> +        audio_bits = TEGRA30_AUDIOCIF_BITS_32;
>>>>> +        sample_size = 32;
>>>>> +        break;
>>>>>       default:
>>>>>           return -EINVAL;
>>>>>       }
>>>>> @@ -170,8 +181,8 @@ static int tegra30_i2s_hw_params(struct
>>>>> snd_pcm_substream *substream,
>>>>>       cif_conf.threshold = 0;
>>>>>       cif_conf.audio_channels = 2;
>>>>>       cif_conf.client_channels = 2;
>>>>> -    cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
>>>>> -    cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
>>>>> +    cif_conf.audio_bits = audio_bits;
>>>>> +    cif_conf.client_bits = audio_bits;
>>>>>       cif_conf.expand = 0;
>>>>>       cif_conf.stereo_conv = 0;
>>>>>       cif_conf.replicate = 0;
>>>>> @@ -306,14 +317,18 @@ static const struct snd_soc_dai_driver
>>>>> tegra30_i2s_dai_template = {
>>>>>           .channels_min = 2,
>>>>>           .channels_max = 2,
>>>>>           .rates = SNDRV_PCM_RATE_8000_96000,
>>>>> -        .formats = SNDRV_PCM_FMTBIT_S16_LE,
>>>>> +        .formats = SNDRV_PCM_FMTBIT_S32_LE |
>>>>> +               SNDRV_PCM_FMTBIT_S24_LE |
>>>>> +               SNDRV_PCM_FMTBIT_S16_LE,
>>>>>       },
>>>>>       .capture = {
>>>>>           .stream_name = "Capture",
>>>>>           .channels_min = 2,
>>>>>           .channels_max = 2,
>>>>>           .rates = SNDRV_PCM_RATE_8000_96000,
>>>>> -        .formats = SNDRV_PCM_FMTBIT_S16_LE,
>>>>> +        .formats = SNDRV_PCM_FMTBIT_S32_LE |
>>>>> +               SNDRV_PCM_FMTBIT_S24_LE |
>>>>> +               SNDRV_PCM_FMTBIT_S16_LE,
>>>>>       },
>>>>>       .ops = &tegra30_i2s_dai_ops,
>>>>>       .symmetric_rates = 1,
>>>>>
>>>>
>>>> Hello,
>>>>
>>>> This patch breaks audio on Tegra30. I don't see errors anywhere, but
>>>> there is no audio and reverting this patch helps. Please fix it.
>>>
>>> What is the failure mode? I can try and take a look at this some time
>>> this week, but I am not sure if I have any boards with an actual useful
>>> audio output?
>>
>> The failure mode is that there no sound. I also noticed that video
>> playback stutters a lot if movie file has audio track, seems something
>> times out during of the audio playback. For now I don't have any more info.
>>
> 
> Oh, I didn't say how to reproduce it.. for example simply playing
> big_buck_bunny_720p_h264.mov in MPV has the audio problem.
> 
> https://download.blender.org/peach/bigbuckbunny_movies/big_buck_bunny_720p_h264.mov

Given that the audio drivers uses regmap, it could be good to dump the
I2S/AHUB registers while the clip if playing with and without this patch
to see the differences. I am curious if the audio is now being played as
24 or 32-bit instead of 16-bit now these are available.

You could also dump the hw_params to see the format while playing as
well ...

$ /proc/asound/<scard-name>/pcm0p/sub0/hw_params

Jon

-- 
nvpublic